Centrifugal casting machine



P. -L. GILL.

CENTRIFUGALICASTING MACHINE.

APPLICATION FILED APR-8.19m.

Arm/Mrs 1 Patented Dec. 9,1919.

3 SHEETS-SHEET I w 6 m 4 m P. L. GILL.

CENTRIFUGAL plasma MACHINE.

APPLICATION FILED APR-8| 1919- i 1,324,660. Patented Dec. 9,1919.

,3 SHEETS-SHEET 2.

. INVENTOR fiLG/u a g A TTORNEYS P. L. GILL.

CENTRIFUGAL CASTING MACHINE.

APPLICATION FILED APR.8.19|9.

1 24,660. Patented Dec. 9, 1919.

3 SHEETSSHEET 3- A TTORNEY8 UNITED STATES PATENT orrrcn. A

PHILIP I. GILL, 0F ENGLEWOOD, NEW JERSEY, ASSIGNOR TO 0 & H CASTING CO., 01

' NEW YORK, N. Y., A CORPORATION OF NEW YORK.

CENTBIFUGAL OASTING-MACHINE Specification of Letters Patent.

Y Application filed April 8, 1919. Serial No. 288,583.

To all whom it may concern: Be it known that I, PHILIP L. GILL, a citlzen of the United States, and a resident of Englewood, in the county of Bergen and State of New Jersey, have invented a new and Improved Centrifugal Casting-Machine, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved centrifugal casting machine more especially designed for casting annular or cylindrical articles of considerable length and arranged to insure a quick delivery into and a proper distribution of the'molten metal within the casting box to prevent undue chilling of the metal and the formation of flaws. Another object is to .permit of making annular or cylindrical castings in which the cross sectional area is nearly as great, equal to or greater than the area of the inside diameter of the casting.

With these and other objects in view the invention consists of certain novel features of construction as hereinafter shown and described and then specifically pointed out in the'claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a plan view of the improved centrifugal casting machine;

Fig. 2 is a side elevation of the same with parts of the casting box and water jacket shown in section;

Fig. 3 is a transverse section of the same on the line 3.3 .of Fig. 2;

Fig. 4 is a side elevation of the delivery spout for delivering the molten metal within the casting box;

Fig. 5 is an inverted plan view of the same;

Fig. 6 is a plan view of a modified form of the delivery spout;

Fig. 7 is a cross section of the same on the line 7-7 of Fig. 6'; I I

Fig. 8 is a lan view of another modified form of the elivery spout; and Fig. 9 is a cross section of the same on the line ,99 of Fi 8. v

The cylindrical casting box 7 10 is provided with a lining 11 of fire clay or other iuitable material, and the ends of the casting ox are provided with central openings 12 and 13 for the passage of a delivery spout 14 provided at its left-hand end with an in- "ed to project through the opening 13 and connects with a filling or pouring head 25 extending outside of the casting -box 191 The filling or pouring head 25 is provided with a depending flange 26 detachably 'held on a suitable support 27, to permit of lifting the head25 off the support 27 after the casting operation is completed. The top of the right-hand end of the spout 14 and the bot tom of the said head provide a non-leaking joint when in assembled position, as shown in Fig. 2. The right-hand end of the delivery spout 14 is provided with" a lengthwise extending supporting member 28 adapted to engage the support 27 to support this end of the delivery spout 14 at the time the delivery spout extends through the casting box 10, asplainly shown in Figs. 1 and 2. It

will be noticed that by the arrangement described the delivery spout '14 when in position within the casting box 10 is provided with two filling or pouring heads 15 and 25 to permitof simultaneously pouring the metal from suitable ladles (not shown) into the said heads 15 and 25 to distribute a large amount of. metal in a very short time within the casting box 10 for forming annular or cylindrical castings therein. The delivery spout 14 is provided in its bottom with an outlet opening 30 opening sidewise into the casting box 10 intermediate the ends thereof, and this opening 30 is formed by splitting the bottom of the delivery spout 14 and locating the walls 31 and 32 of the opening in vertical spaced relation, as

plainly-indicated in Fig. 3, with the lower.

.pact to render the grains exceedingly dense and cohesive thus insuring the production of a high tensile strength. It is understood that the mass of molten metal poured by the ladies into the heads 15 and 25 is for the casting of a single ring of a desired thick ness and of a length covered by the interior length of the casting box. The opening 30 is preferably wider at the middle than at the ends, as plainly indicated in Fig. 4, thus reducing the opening from the middle toward the ends with a view to insure a quick distribution of the molten metal within the casting box 10. v V

In order to' supportand drive the casting box 10 the following arrangement is made: Near the right-hand end of the casting box 10 is secured or formed a wheel 40 resting on supporting rollers or wheels 41 and 42 secured on shafts 43 and 44, of which the shaft 43 is journaled in suitable'bearings arranged on standards 45, 46, 47 and 48 attached to a base 49. The shaft 44 is journaled in suitable bearings arranged on the standards and 46. On the left-hand end of the casting box 10 is secured or formed a grooved wheel 50 supported on correspondingly grooved wheels or rollers 51 and 52, of which the wheel 51 is secured on the shaft 43 while the roller 52 is securedon a shaft 53 j ournaled in suitable bearings arranged on the standards 47 and 48. On the shaft 43 is secured a pulley 54 connected by a'belt with other machinery for imparting a rotary motion to the shaft 43 thus rotating the wheels 41 and 51 which impart their rotary motion to the wheels 40 and 50 to rotate the casting box 10.

In order to insure a proper driving by the wheels41 and 51, a downward pressure is exerted on the wheels 40 and 50 to hold the latter in firm contact with the driving wheels 41 and 51. For the purpose mentioned use is made of lain and grooved rollers 60 and 61 secured on shafts 62, 63, of which the shaft 62 is journaled in bearings 64 mounted to slide vertically in guideways 65 formed on the upper ends of the standards 45 and 46. A spring 66 presseson each of the bearings 64 to hold the wheel 60 in firm contact with the wheel 40. The shaft 63 is journaled in spring-pressed bearings 67 similar to the bearings 64 (see dotted lines in Fig. 2) vertically slidable in bearings arranged on the standards 47 and 48.

In order to quickly cool the casting b'oxlO after the casting operation is completed, use

is made of a water jacket 70 surrounding the castin box intermediate the wheels 40 V and 50. n the top of the water jacket 70 is arranged a longitudinally extending pipe 71 provided at its bottom with perforations 72 for directing jets of water exteriorly onto the casting box 10. The pipe 71 is connected at 1ts mid 1e by a supply plpe 72 with a suitable source of water supply, and the water is turned on as soon as the casting operation is completed. The bottom of the jacket 70 is provided with a water outlet ipe 73 for carrying off the hot water to a suitable place of discharge.

The operation is as follows:

The carriage 20 in outermost position is moved toward the left end of the rotating casting box 10 to move the delivery spout 14 through the opening 12 into the casting box with the free end of the delivery spout finally extending through the opening 13, as shown in Fig. 2. When this takes place the supporting member 28 is seated on the support 27 and the free end of the delivery spout 14 makes connection with the removable filling or pouring head 25. Ladles filled with molten metal are now moved into position adjacent the heads 15 and 25 and the desired amount ofmolten metal is poured inapproximately half portions into the filling .heads 15 and 25, from which the molten metal passes into the delivery spout 14 from the opposite ends thereof. The molten metal withln the spout passes through the opening 30 into the casting box 10 in a tangential direction relative to the casting box 10 rotating in the direction indicated by the arrow in Fig. 3. It will be noticed that by the arrangement described the molten metal is quickly and uniformly distributed within the casting box 10, to insure the formation of a hollow article, without undue chilling of the metal. It will also be noticed that by delivering the molten metal in the manner described, the grains of metal are compacted to insure the formation of a homogeneous product of great tensile strength. After the molten metal is delivered to the casting box 10 the head 25 is lifted ofl the delivery spout 14 and the support 27 and then the carriage 20 is moved to the left into an outermost position, thereby moving the delivery spout out of the casting box 10. The casting machine is then stopped and the cast article is removed from the casting box usually through the left-hand end of the casting box, from which the left-hand head is removed for the purpose. The left-hand head is next replaced and then the machine is started up again and the above described operation is repeated for casting-another hollow article.

The delivery spout may be made as shown in Figs. 6 and 7, that is, in the form of a trough 80, open at one side and provided at one end with an integral filling head 81 and adapted to connect at the other end with the detachable filling head 82 similar to the filling head 25.

wise inclined ribs 84: to insure proper uniform distribution of themolten metal.

. end with an integral filling head 92 and the right-hand endof the said spout is adapted similar to the filling head 25-.

to connect with a detachable filling head 93 Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. In a centrifugal casting machine, a revoluble casting box open atthe ends, and a delivery spout extending through the said open ends and provided at its ends with pouring heads outside the said casting box to allow pouring molten metalsinto botlr heads while the delivery spout is in position in the casting box, the said spout having discharge means in its bottom within the said casting box.

2. In a centrifugal revoluble casting box provided with covers at both' ends, each cover having a central opening, and a delivery spout adapted to extend through the castin box and out of the cover openings, the de lvery' spout being rovided'attheends outside of the casting ox with receiving heads of which one is integral on the s out and the .other is detachably en age by the corresponding spout end, t e said delivery spout having I dlscharging means within the casting box.

3. In a centrifugal casting machine, a

revoluble casting box provided with open-' ings at the ends, a carriage movable toward and from one end of the said casting box, a delivery spout having a pouring head at one ed to the said carriage and the into the castin box at the sai end and to project throng the other end thereof, and a second pourmg k eadoutside the other end of the casting box and engaged by the free The bottom 83 of this trough-like spout 80 is provided wlth side.

' extendin casting machine, a'

end of the said delivery spout, the latter having a discharging means within the casting box.

4:. In a centrifugal casting machine, a

5. In a centrifugal casting machine a revoluble casting box and a delivery spout I within the said casting box, the spout being split lengthwise at its bottom within the castin split being spaced apart in vertical relation .to forman outlet opening which opens sidewise into the castingbox, the lower wall of the said outlet opening projecting beyond the upper wall of the said opening.

6. In a centrifugal machine, a delivery spout having an integral filling head at one end, and a filling head detachably connected.

with theother end of the spout.

box, the side walls of the.

7. In a centrifugal machine, a revoluble casting box, a delivery spout adapted t9, extend through the said casting box, andiprovided atone end with a filling head, anarriage mounted to travel toward and from one end of the said casting box and on which the said filling head is secured, a support adjacent the other end of the casting box, and a filling head attached to the said support and adapted to be engaged by the free end of the said delivery spout.

8. In a centrifugal machine, a revoluble castin box, a delivery spout adapted to extend t rough the said casting box and provided at one end with a filling 'head, a carriage mounted to travel toward and from one end of the said casting box and on which the said'filling head is secured, a sup ort,

adjacent the other end of the castin and a filling head attached to the sai support and adapted to be engaged by the free end of the said delivery spout, the said free end of the delivery spout having a supporting member adapted to engage the said support to support the free end of the delivery spout.-

PHILIP L. GILL. 

